Statistical inference, Basic Statistics

Assignment Help:

A study was conducted at a major north-eastern American medical centre regarding blood cholesterol levels and heart-attack incidents. A total of 28 heart-attack patients had their cholesterol levels measured two days and four days after the attack. The units of measurement are milligrams per decilitre (mg/dL). The data are given below.

2078_STATISTICAL INFERENCE.png

Investigate whether there is evidence that the mean cholesterol level two days after a heart attack is different from that four days after a heart attack.

1. State the model behind the appropriate t-test, and assess those assumptions for which suf?cient information has been provided. (You are given that your assessment will not reveal any problems with the model and that the t-test is appropriate.)

2. Clearly state the appropriate null hypothesis and carry out the t-test

3. If it is concluded that there is evidence of a difference between the mean cholesterol level two days after a heart attack and that four days after a heart attack, obtain a 95% con?dence interval for this difference. Explain in your own words how the con?dence interval should be interpreted.


Related Discussions:- Statistical inference

Characteristics, explain the characteristics of statistics

explain the characteristics of statistics

Joy, Ask questio How many women must be randomly selected to estimate the m...

Ask questio How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the sample mean is within 3.7 lbs of the po

Determine the probability - baye theorem, In a suburban community, 30% of t...

In a suburban community, 30% of the households use Brand A toothpaste, 27% use Brand B, 25% use Brand C, and 18% use Brand D. In the four groups of households, the proportions of r

Conditional probability, The U.S. Department of Transportation reported tha...

The U.S. Department of Transportation reported that during November, 83.4% of Southwest Airlines’ flights, 75.1% of US Airways’ flights, and 70.1% of JetBlue’s flights arrived on t

Probability distribution, In a mathematics examination the average grade wa...

In a mathematics examination the average grade was 82 and the standard deviation was 5. all students with grade from 88 to 94 received grade of B. if the grade are approximately no

Calorimetry, How do I calculate the temperature change of a sample?

How do I calculate the temperature change of a sample?

Probability, Suppose I ask you to pick any four cards at random from a deck...

Suppose I ask you to pick any four cards at random from a deck of 52, without replacement, and bet you one dollar that at least one of the four is a face card (i.e., Jack, Queen, o

Generate a hypothesis test , An instructor wants to determine which of his ...

An instructor wants to determine which of his students are A students and which are B students (this is a graduate course, so clearly all the students are either A or B stu

Regression, Read the article “Apple turns over entire inventory every five ...

Read the article “Apple turns over entire inventory every five days.”1 It is not surprising that, the success of managing inventory can lead to the success of a firm’s operational

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd